Flexible protector for carbon paper



March 2,1926. I 1,575,230

C. P.'SCHMITT, JR

FLEXIBLE PROTECTOR FOR CABON IPAPER Filed DeC. 3, 1924 Carbon Patented Mar. z, 192e.

UNITED s'ra'rl-:sv

CHARLES P. SCHIITI, JR., F CHICAGO, ILLINOIS.

FLEXIBLE raornc'ron ron cannon rana.

- Application filed December 3, 19.24. Serial No. 753,588.

To all whom t 'may concern` l Be it known that I` CHARLES P. SCHMrrr, Jr., a citizen ofthe United States, residing in the city of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Flexible Protectors for Carbon Paper, of which the fol lowing is a specification.

This invention relates to improvements in a flexible protector or protectors for carbon paper and the like, and refers more particularly to a sheath or shield adapted to overlie or be superposed above the upper surface of the sheet or sheets of carbon paper, this shield adapted to receive the physical blow of the sharp. or heavy type indirectly striking against same. The protector forming the basis of this invention is adapted particularly for use with a bookkeeping and billing machine. I

Some of the advantages accruing from the use of the 'protector` may be the increase in the life andvdurability of the carbon paper itself, a substantial decrease in vsmudging and soiling, which has heretofore been more or less of a problemv in this art, and from an economical standpoint the advantages will be readily appreciated.

In the particular embodiment ofthe present invention, the protector comprises a sheet of relatively thin flexible material adapted to be rolled with one or more plies'of carbon paper, held in such rolled form until ready,

for use, and then the roll itself is attached to the bookkeeping or billing machine in the same manneras the rolls of carbon paper are no'W installed. In unrolling the carbon paper from the roll and positioning it for use, the thin sheet of protective material will be uppermost, that is, overlying the upper surface of the ply or plies of carbon paper. When the bookkeeping or billing machineis then operated, the type indirectly strikes the protecting material, which absorbs most of the physical force naturally exerted by the force of the sharp, heavy striking type.

The protector is preferably constructed lof thin paper, very strong in ltexture and coated with a strengthening composition, for instance, it has been found in actual practice that this protector may take the -form of glassined paper having a weight which will not interferewith the producing of legible carbon copies.

Heretofore, in using carbon paper rolls in connection with and boelskping machines, it4 has been found that sharp type will cut through the original sheet of paper and also cut through carbon paper.` This has been found to be a usual occurrence, rather than unusual, and has resulted in a great waste o'f carbon paper, and the increase in maintenance cost ofv these machmes, as carbon paper is relatively yexpensive. I have found that by interposinga thln sheet of flexible material'over the upper surface of the carbon paper, that I can elimmate the cutting or chewing of the carbon paper itself, thus naturally prolonging its life and durability.

Referring to the drawings, Fig. l'is a perspective "View of a roll Containing-a single ply of carbon paper with my protector wound up in roll form.

Fig. 2 is an edge view of a roll containing more than one ply of carbon paper, illustratlng one use of my protector, in which the rotector overlies only the top ply.

Fig. 3 is an edge view of a roll of carbon paper containing more than one ply in which the protector is interposed between the various plies.

Referring in detail to the drawings, l designates a sheet of carbon paper which is semi-coated, the coated surface being shown as having the inked surface face downward. Overlying the upper surface or back of the carbon paper is a sheet of relatively thin tiexible material 2, which may take the form 'of glassine paper and the like. When the carbon paper is produced in the factory, it is wound in a roll with the sheet of flexible irotecting material interposed therebetween.

Then the carbon roll is'then placed on a machine and unrolled for use over the writing surface, the sheet of flexible protecting material is uppermost overlying the carbon paper and underlying' the origiiial copy. The force of the sharp heavy type stri-king` against the original will be absorbed to a considerable extent by the tough texture of the fiexibleprotector, thus eliminating to a very great extent the danger of cutting through the carbon paper.

In Fig. 1 I have shown a single sheet of fiexible protecting material overl ing the single sheet of carbon paper. In ig. 2, I have shown a single sheet of protecting material overlying more than one ply of carbon paper. In Fig. 3, I have shown flexible sheets of rotecting material interposedbetween plies ,of carbon paper, the

' upper sheet ofrprotec'ting material overlying the top ply of carbon paper. f

It has been found in actual commercial use that as a minimum, the length of life of the carbon ,paper has been prolonve'd 300%,

l'the expense involved in the use ofaa flexible protecting material such as herein described, including the cost` of the material itself, the

rcost of winding it on the roll, is much less than the amount saved by the use of such a flexible protector. Further, by the use of the flexible protecting material ,described herein, the operators have found that there is less likelihood of smudge and therefore, the carbon paper is cleaner to`handle, eliminat-ing the loss of time generally necessary for cleaning soiled ,hands, and producing neater Work.

As another advantage accruingvfrom the use of my invention, I am enabled to utilize un yery high grade of carbon paper in conjunction with' a high grade of ink, for in-A stance a seven-pound paper; At the present time, there is generally used with these `machines a carbon paper runnin from ten to fifteen pounds, which is very rittle. vIt has been found that the size of7 the carbon paperiroll is not materially increased by' i functioning as a protector for the carbon sheet, and adapted to overlie the upper surface thereof.

3.,In combination, a carbon sheet, and a Sheet of thin flexible material associated therewith, adapted to act solely as a protector for the carbon sheet, and overlying the upper surface and functioning` to limit the penetration v of n type indirectly striking t-hereagain'st.

4. In combination, a carbon'sheet, and a thin flexible7 protector sheet, superimposed thereon, and adapted in use to be interposed between the carbon paper and a sheet receiving direct impressions from type. f CHARLES P. SCHMITT, J u. 

